make Groupchat more IRC-like
/commands should be catched and used and should emulate as much as possible th IRC ones
we should catch status changes and print sth. eg a user is online but goes Busy. jabberd1 for sure doesn't send a server message about that in order to be printed, but a status one. so when we change the icon in the muc list, we can also print [client-side] info about that. string for that should be IRC like